Nexperia USA Inc. 74HC139D,653

Overview

74HC139D,653 from Nexperia is a dual 2-to-4 line decoder/demultiplexer in SO16 (SOT109-1) package, operating from 2.0 V to 6.0 V, featuring active-LOW mutually exclusive outputs, TTL-compatible input thresholds for 74HCT variant, and -40 °C to +125 °C temperature range. It implements two independent decoders with separate enable inputs (1E, 2E), enabling memory address decoding and data routing in microcontroller peripheral interfaces.

For engineers reviewing the 74HC139D,653 datasheet, 74HC139D,653 pinout, 74HC139D,653 application, or 74HC139D,653 equivalent, key selection criteria include propagation delay (14 ns typ @ 4.5 V), output drive capability (±4 mA), CMOS-level input compatibility, and SO16 thermal derating profile above 110 °C.

Technical Context

The device integrates two identical 2-to-4 decoders, each accepting two binary address inputs (nA0, nA1) and one active-LOW enable (nE); when nE is HIGH, all four outputs (nY0–nY3) are forced HIGH regardless of address state. The enable input doubles as a data input for 1-to-4 demultiplexing, supporting time-multiplexed signal distribution.

Each decoder operates with CMOS logic levels (74HC139) or TTL-compatible inputs (74HCT139), features input clamp diodes for overvoltage tolerance, and delivers active-LOW outputs with guaranteed VOL ≤ 0.26 V at 4.0 mA sink current and VOH ≥ 3.98 V at 4.0 mA source current under 4.5 V supply.

Key Specifications

Pinout & Package

74HC139D,653 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard 1.27 mm lead pitch and gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 2-to-4 decoder applications.

Compared with 74HC139D,653, the TSSOP variant offers superior thermal performance in compact layouts, while the LS139 provides legacy TTL compatibility at the cost of voltage flexibility and static power efficiency.

Availability

74HC139D,653 is available at Aetrix Electronics and suitable for memory address decoding, peripheral select logic, LED segment driver interfaces, and industrial I/O expansion requiring stable component supply across extended temperature ranges.

Supply support for 74HC139D,653 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.

The 74HC139 product line targets general-purpose digital logic functions in resource-constrained embedded systems, emphasizing low static power, wide supply range, and robust ESD immunity for long-lifecycle deployments.

FAQ

Can 74HC139D,653 operate at 3.3 V supply?

Yes - the 74HC139 variant is fully specified from 2.0 V to 6.0 V, with VIH(min) = 1.5 V and VIL(max) = 0.5 V at VCC = 2.0 V, scaling linearly. At 3.3 V, it guarantees VIH ≥ 2.31 V and VIL ≤ 1.09 V, making it compatible with standard 3.3 V CMOS logic families without level shifters.

What is the maximum output sink current per pin?

The absolute maximum output current is ±25 mA per pin, but the recommended operating condition specifies ±4.0 mA at VCC = 4.5 V with VOL ≤ 0.26 V. Exceeding 4 mA risks violating VOL specs and increasing propagation delay; sustained operation above 4 mA requires thermal derating per the SO16 package's 12.4 mW/K slope above 110 °C.

How does the enable input function in demultiplexer mode?

When used as a 1-to-4 demultiplexer, the enable input (e.g., 1E) becomes the data input, while 1A0/1A1 serve as select lines. A LOW on 1E passes the data state to the selected output (e.g., 1Y0 if A0=A1=0); a HIGH forces all outputs HIGH - effectively gating the data path with zero propagation delay penalty relative to address changes.

Is 74HC139D,653 pin-compatible with 74HCT139D,653?

Yes - both share identical SO16 pinout, pin functions, and mechanical footprint (SOT109-1). The only difference is input threshold behavior: 74HC139 requires CMOS-level inputs (VIH ≥ 0.7×VCC), while 74HCT139 accepts TTL-level inputs (VIH ≥ 2.0 V). Electrical substitution is safe if input sources meet the stricter threshold requirement of the chosen variant.